Question 990937
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The sum of the ages of Gregory and Marissa is 60 years.
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So G + M = 60
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6 years ago, Gregory's age was 2 times Marissa's age. How old is Gregory now?
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6 years ago Gregory was G-6 and Marissa was M-6.

So G-6 equals 2 times M-6.

So the second equation is G-6 = 2(M-6)

So solve the system of equations by first simplifying the second equation:

{{{system(G+M=60,G-6=2(M-6))}}} 

G=38, M=22

Edwin</pre>